package com.mass.core.generator;

import java.util.List;  

import org.mybatis.generator.api.CommentGenerator;  
import org.mybatis.generator.api.IntrospectedTable;  
import org.mybatis.generator.api.PluginAdapter;  
import org.mybatis.generator.api.dom.java.Field;  
import org.mybatis.generator.api.dom.java.JavaVisibility;  
import org.mybatis.generator.api.dom.java.Method;  
import org.mybatis.generator.api.dom.java.Parameter;  
import org.mybatis.generator.api.dom.java.PrimitiveTypeWrapper;  
import org.mybatis.generator.api.dom.java.TopLevelClass;  
import org.mybatis.generator.api.dom.xml.Attribute;  
import org.mybatis.generator.api.dom.xml.TextElement;  
import org.mybatis.generator.api.dom.xml.XmlElement;  
 
public class PaginationPlugin extends PluginAdapter {  
      
    public boolean modelExampleClassGenerated(TopLevelClass topLevelClass,  
            IntrospectedTable introspectedTable) {  
        addLimit(topLevelClass, introspectedTable, "pageIndex");  
        addLimit(topLevelClass, introspectedTable, "pageSize");  
        return super.modelExampleClassGenerated(topLevelClass,  
                introspectedTable);  
    }  
      
    public boolean sqlMapSelectByExampleWithoutBLOBsElementGenerated(  
            XmlElement element, IntrospectedTable introspectedTable) {  
        XmlElement isNotNullElement = new XmlElement("if"); //
        isNotNullElement.addAttribute(new Attribute("test", "pageIndex != null and pageSize>=0"));   
        isNotNullElement.addElement(new TextElement(  
                "limit #{pageIndex} , #{pageSize}"));  
        element.addElement(isNotNullElement);  
        return super.sqlMapUpdateByExampleWithoutBLOBsElementGenerated(element,  
                introspectedTable);  
    }  
    private void addLimit(TopLevelClass topLevelClass,  
            IntrospectedTable introspectedTable, String name) {  
        CommentGenerator commentGenerator = context.getCommentGenerator();  
        Field field = new Field();  
        field.setVisibility(JavaVisibility.PROTECTED);  
        field.setType(PrimitiveTypeWrapper.getIntegerInstance());  
        field.setName(name);  
        commentGenerator.addFieldComment(field, introspectedTable);  
        topLevelClass.addField(field);  
        char c = name.charAt(0);  
        String camel = Character.toUpperCase(c) + name.substring(1);  
        Method method = new Method();  
        method.setVisibility(JavaVisibility.PUBLIC);  
        method.setName("set" + camel);  
        method.addParameter(new Parameter(PrimitiveTypeWrapper.getIntegerInstance(), name));  
        method.addBodyLine("this." + name + "=" + name + ";");  
        commentGenerator.addGeneralMethodComment(method, introspectedTable);  
        topLevelClass.addMethod(method);  
        method = new Method();  
        method.setVisibility(JavaVisibility.PUBLIC);  
        method.setReturnType(PrimitiveTypeWrapper.getIntegerInstance());  
        method.setName("get" + camel);  
        method.addBodyLine("return " + name + ";");  
        commentGenerator.addGeneralMethodComment(method, introspectedTable);  
        topLevelClass.addMethod(method);  
    }  
    public boolean validate(List<String> warnings) {  
        return true;  
    }  
}  
